Naturalization and Citizenship Guide 2026: 5-Year Rule, N-400, Civics Test, and Oath
Naturalization is the final step in the immigration journey for most green card holders, converting permanent residence into full US citizenship with voting rights, a US passport, and permanent protection from removal. This guide walks through the residency requirements, filing process, and testing that stand between a green card and a citizenship oath.
The 5-Year Rule and Continuous Residence
Most green card holders become eligible to naturalize 5 years after becoming a permanent resident (3 years if married to and living with a US citizen spouse for that entire period). Two related but distinct requirements must both be satisfied: continuous residence (you have not taken any single trip abroad of 6 months or longer, and ideally not accumulated excessive time outside the US even in shorter trips) and physical presence (you must have been physically present in the US for at least half of the required residency period — 30 months out of 5 years, or 18 months out of 3 years). Trips abroad of 6-12 months create a presumption of broken continuous residence that must be overcome with evidence; trips of a year or more automatically break continuous residence, generally requiring the residency clock to restart.
Filing Form N-400
File Form N-400 online or by mail with USCIS. As of 2026, the filing fee is $760 (or $1,255 total combining application and biometrics for those not eligible for a fee reduction), with reduced fees available for applicants meeting certain low-income thresholds. Required documentation includes your green card, evidence of continuous residence and physical presence (travel history), and — depending on your situation — marriage/divorce records, tax returns, and selective service registration proof for male applicants who were required to register. USCIS will schedule a biometrics appointment and subsequently an interview.
The Civics Test and English Requirement
Applicants must pass an English test (reading, writing, and speaking, assessed partly during the interview conversation itself) and a civics test covering US history and government. The civics test as of 2025-2026 draws from a set of 100 possible questions (with periodic revisions to the test format that applicants should confirm against USCIS's current version at filing), and applicants must answer a required number correctly during the interview. Exemptions and modifications exist: applicants 50+ who have held a green card for 20+ years, or 55+ with 15+ years, may take the civics test in their native language; applicants with certain qualifying medical disabilities may request a full exemption via Form N-648.
Interview, Oath, and Timeline
The N-400 interview combines the civics/English testing with a review of your application answers and background. If approved, you will be scheduled for an Oath of Allegiance ceremony — either the same day in some field offices (same-day oath programs) or at a later scheduled ceremony. After taking the oath, you receive your Certificate of Naturalization immediately, at which point you are a US citizen and can apply for a US passport. Total processing time for N-400 in 2026 typically runs 8-14 months from filing to oath, though this varies significantly by USCIS field office.
Frequently asked questions
How long do I need a green card before I can apply for citizenship?
Most green card holders can apply for naturalization after 5 years of continuous residence as a permanent resident. If you are married to and living with a US citizen spouse for the entire period, this is reduced to 3 years. You can technically file Form N-400 up to 90 days before completing the required residency period under USCIS's early filing provision.
What happens if I travel abroad for a long trip before naturalizing?
Trips of 6-12 months create a presumption that you broke continuous residence, which you can attempt to overcome with evidence showing you maintained ties to the US (job, home, family) throughout the trip. Trips of 12 months or longer automatically break continuous residence in nearly all cases, generally requiring your residency clock toward naturalization eligibility to restart from your return date.
What is on the civics test for naturalization?
The civics test covers US history and government, drawn from a set of up to 100 possible questions established by USCIS, with applicants required to answer a specified number correctly during the interview. Some applicants qualify for modified testing: those 50+ with 20+ years as a green card holder, or 55+ with 15+ years, may test in their native language, and applicants with qualifying medical disabilities may request an exemption via Form N-648.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. Immigration law is complex and situation-specific. Always consult a licensed immigration attorney before making decisions about your immigration status.